/*
 * Copyright (c) 2012 swing-on-fire Team
 * 
 * This file is part of Swing-On-Fire (http://code.google.com/p/swing-on-fire), licensed under the terms of the MIT
 * License (MIT).
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
 * documentation files (the "Software"), to deal in the Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the
 * Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
 * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
package com.google.code.swingonfire.utility.interpolation;

public class EnvelopeInterpolation implements Interpolation
{

    private final Interpolation interpolation;
    private final Interpolation envelope;
    private final double minimum;
    private final double maximum;

    public EnvelopeInterpolation(Interpolation interpolation, Interpolation envelope)
    {
        super();

        if (interpolation == null)
        {
            throw new IllegalArgumentException("Interpolation is null");
        }

        if (envelope == null)
        {
            throw new IllegalArgumentException("Envelope is null");
        }

        if ((envelope.getMinimum() != 0) || (envelope.getMaximum() != 1))
        {
            throw new IllegalArgumentException("Envelope minimum and maximum != 0 and 1");
        }

        this.interpolation = interpolation;
        this.envelope = envelope;

        minimum = interpolation.getMinimum() * envelope.getMinimum();
        maximum = interpolation.getMinimum() * envelope.getMaximum();
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public double getMinimum()
    {
        return minimum;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public double getMaximum()
    {
        return maximum;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public double calculate(double value)
    {
        return interpolation.calculate(value) * envelope.calculate(value);
    }

}
